Exercise machine



FIG. 1 is a front perspective view of a first embodiment thereof.

FIG. 2 is a top plan view thereof.

FIG. 3 is a bottom plan view thereof.

FIG. 4 is a front elevational view thereof.

FIG. 5 is a rear elevational view thereof.

FIG. 6 is left side elevational view thereof.

FIG. 7 is a right side elevational view thereof.

FIG. 8 is a front perspective view of a second embodiment thereof.

FIG. 9 is a top plan view thereof.

FIG. 10 is a bottom plan view thereof.

FIG. 11 is a front elevational view thereof.

FIG. 12 is a rear elevational view thereof.

FIG. 13 is left side elevational view thereof; and,

FIG. 14 is a right side elevational view thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an exercise machine, as shown and described. 